Technically isn't.Streaming is a whole different segment than downloading.

The way you look at it, Streaming is a session, which you download, and upload data.

Youtube is a site that streams video to you, you don't literally download something to save and use it, it's temporary data that is used and erased after the user browse elsewhere.

However, streaming may be one thing, capturing that stream is another animal. What about all these apps that "allow" you to download videos of youtube? Or the apps that "rips" the music from the youtube video? We can also visit the apps that capture songs being streamed on the internet and stores them (with tags) on your PC. As long as Youtube plants "temp" files on your PC, "technically", your keeping part of said file on your PC till you clean up. Just sayin